Mechanical movement.



J. A. WORKMAN, SR. MECHANICAL MOVEMENT.

APPLICATION FILED MAY 2a, 1910.

Patented June 6, 1911.

2 SHEETS-SHEET 1.

mw/ wx 1N VEN TOR. JAE..A.WDRKMAN Ea.

WITNESSES.

A TTOHNE Y.

J. A. WORKMAN, SR. MECHANICAL MOVEMENT.

APPLICATION FILED MAY 23, 1910.

Patented June 6, 1911.

2 BHBETSSHEET 2.

INVEN TOR. JAE. A.WUHKMA1 I SE.

WITNESSES:

A 'I'TOIZNE Y.

JAMES A. WORKMAN, SR., 013 PORTAGEVILLE, MISSOURI.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented June 6, 1911.

Application filed May 23, 1910. Serial No. 562,972.

To all whom it may concern:

Be it known that I, JAMES A. WORKMAN, Sr., a citizen of the United States, residing at Portageville, in the county of New Madrid and State of Missouri, have invented .certain new and useful Improvements in Mechanical Movements; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to an improved mechanical movement and more particularly to a reciprocating rack and driving mechanism therefor.

The object of my invention being to provide a power transmission of the reciprocatory type which is simple and economical in construction and comprises the improved details of structure hereinafter described and ointed out in the claims, reference being ad to the accompanying drawings, in which Figure I is a view in side elevation of a mechanical movement constructed according to my invention. Fig. II is a similar view taken from the opposite side of-the device, the gear wheel and levers ,being shown in a different position. Fig. III is a detail view of one of the gear wheels and a portion of the rack showing the latch pawl as it is about to pass into locking engagement with the gear wheel. Fig. IV is a view of the same arts showing the pawl about to be lifted rom its locking engagement. Fig. V is a cross sectional view on the line VV, Fig. I. Fig. VI is a cross sectional view on the line VIVI, Fig. I.

Referring more in detail to the parts :1 designates the frame of the device which may be of any suitable shape and material. Located in the lower portion of the frame is an upwardly opening runway 2, having. anti-friction rollers 3 revolubly mounted thereon and located below the top of the runway, so that a groove is provided thereabove. Depending from the upper portion of the frame is a runway 4, similar to the part 2, and having anti-friction rollers 3. The upper and lower runways are in staggered re lation, so that the grooved portions thereof do not face each other, but are offset as are provided with devices 9 with which a.

pltman or other device may be connected.

At each side of and about the center of the frame 1, are standards 10 having a cross member 11. J ournaled in the cross members 11 and extending transversely through the frame, is a shaft 12, one end of which projects laterally beyond the frame and is provided with a suitable crank mechanism 13 with which an engine pitman, or other driving device, may be connected. Loosely mounted on the shaft 12, within the frame, are the gear wheels 14 and 15, these wheels being identical in construction but given separate reference numerals to facilitate the description of their operation. Fixed to the shaft 12 at the outer sides of the gear wheels is a sleeve 16 having a collar 17 which bears against the outer face of the adjacent gear wheel andspaces same from the frame and in position for engaging the upper and lower racks respectively. The gear wheels are spaced from each other by a collar 18 carried on the shaft 12. Each of the collars 17 is provided with a tooth socket 19 which is adapted for receiving the tooth 20, which PI'OJBCtS from the inner face of a pawl 21, pivoted on the wheel 14 or 15. The 21 is pivoted at about its center and the toothed end is normally yieldingly pressed pawl inwardly by a spring 22, which is also mounted on the gear wheel.

Mounted on the frame and projecting inwardly therefrom, below the hub 16, but stopping short of the collar 17, is a curved plate 23. Fixed to the tooth 20 and projecting laterally therefrom is a dog 24 which is spaced from the bottom of the pawl, so that it may pass either above or below the plate 23, according to whether the tooth 201s in position within the socket 19 in the col lar 17 ,or is traveling on the periphery of the collar. I preferably provide the pawl 21 with a lateral extension 25 which travels below the plate 23 when the dog 24 is traveling thereabove and serves in a limlted measmm as a guide.

. is free, the wheel 15 Pivoted to the frame 1 and projecting into the path of travel of the pawl is a trip dog 26, the end of which is beveled above and below to engage the beveled end of the pawl 21. The tripping end of dog 26 is heavier than its opposite end, in order that it may fall by gravity to its tripping position and the movement of this end is limited by a pin 27 which engages the opposite end of the dog.

While I have described in detail but one of the gear wheels and controlling parts, it is understod that the wheels are identical and the controlling parts are in duplicate; the only difference being that the wheels engage the upper and lower racks respectively, and that the parts on the respective wheels act oppositely, that is when one of the arts is in operative engagement with its sha collar, the other part will be traveling loosely and vice-versa.

Presuming the parts to be constructed and assembled as described, power may be applied to the shaft 12, so that the drivin; collars are revolved in the direction of the arrow, Fig. 111. Presuming the tooth 24, on the pawl, carried by the gear wheel 14 which meshes with the lower rack, to be in position in the socket in its collar 17, it is apparent that a revolution of the shaft and collar will carry the pawl andthe gear wheel to which it is mounted, around with it,.so that the rack frame is moved toward one end of the frame. While the pawl on the wheel 14 is in this locking engagement, the

pawl on the opposite wheel will be free, so

that the wheel 15 will move loosely on the shaft and will be turned in the direction opposite to the wheel 14, because of the travel of the rack with which it meshes. When the wheel 14 has completed a revolution, the beveled end of the pawl 25 engages the upper beveled face of the trip dog 26, and is lifted so that the tooth 20 is removed from'the socket in the sleeve 16 and the collar moves on around for a succeeding revolution, the

collar and gear wheel now being free ofeach other. When the parts on the wheel 14 have assumed this position, the parts on the wheel 15 take hold, so that as soon as the wheel 14 looks on the shaft and revolves in the direction of travel that the wheel 14 has been taking, but as it meshes with an upper instead direction of the racks travel is reversed.- When the rackis moved in its opposite direction the wheel 14 is revolved by the lower rack, so that it is carried around in the direction opposite that of 'its driving travel. When the tooth duringthis travel, the tooth 20 the periphery of the collars 17 and the dog 24 is held away from the collar, so that when theplate 23 is reached, it engages the under side thereof, thereby holding the tooth out travels over of a lower rack, the

20 passes beneath the shaft,

of the socket 19, when the parts pass. When this second revolution has been completed, the pawl on the gear wheel 14 again takes into the collar socket and the direction of travel is reversed; this operation being continued during the entire operation of the dev1ce.

Having. thus described my invention, what I claim as new therein and desire to secure by Letters-Patent is 1. A'mechanical movement comprising an upper and a lower rack, gear wheels having separate engagement with the upper and lower racks, and means for actuating said gear wheels.

2. A mechanical movement comprising upper and lower racks, gear Wheels meshing with said racks and adapted for movement independently of each other, and means for actuating said gear wheels.

3. A mechanical movement comprising a frame having inwardly facing racks, separate gear racks, andmeans for actuating said gear wheels.

4. A mechanical movement comprising racks, revoluble gear wheels having independent engagement with separate racks, and means for actuating said gear wheels.

5. A mechanical movement comprising a frame having offset, inwardly facing racks,

an axle, gear wheels loosely mounted on and driven from said axle and having independent engagement with said racks, and means for alternately locking the said axle, substantially as specified.

6. A mechanical movement comprising a main frame having offset upper and lower runwa s, a reciprocatory frame having olfset rai s adapted for travel in said runways and provided with inwardly facing rack members, gear wheels carriedby the main frame in mesh with said racks, and means for actuating said gear wheels.

7. A mechanical movement main frame, a reciprocatory frame having inwardly facing-racks, a shaft carried by the main frame, gear wheels loosely mounted on said shaft and having independent engagement with the racks, collars fixed on said shaft, pawls pivoted on said gear wheels and having teeth adapted for locking engagement with said collars, and means for tripping said pawls to disengage same from the collars.

8. A mechanical movement comprising a main frame, a reciprocatory frame adapted for travel in the main frame and having inwardly facing racks, a shaft carried by the main frame, a pair of ear wheels loosely mounted on the shaft an engaging separate racks, collars fixed on said shaft and provided with peripheral sockets, pawls fixed on said gear wheels and having teeth adapted for projection into the sockets in said colcomprising a gear wheels to wheels meshing with the separate lars, springs normally tensioning the pawl teeth toward the collars, and a trip dog on the main frame, adapted for lifting said pawls out of locking engagement with the collars.

9. Amechanical movement comprising a main frame, a reciprocatory frame adapted for travel in the main frame and provlded with inwardly facing racks, a shaft carried by the main frame, gear wheels revolubly mounted on said shaft and having separate engagement with the separate racks, collars fixed on said shaft, pawls pivoted on said gear wheels, teeth on said pawls adapted for 1projection into the collar sockets, plates 15 xed on the main frame and projecting toward said collars, dogs on said pawls for the main frame and ada ted for releasing 20 engagement with said paw s, substantially as and or the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES WORKMAN, SR.

Witnesses:

G. M. BUROHAM, MYRTLE M. JACKSON. 

